532 



INDEX 



Mesogloea, definition of, 51. 



Mesohippus, 433. 



Mesothorax, 192. 



Mesozoa, 53. 



Mesozoic era, 13 ; duration of, 423, 443. 



Mesozoic fossil invertebrates, 424. 



Mesozoic fossil vertebrates, 425. 



Mesozoic Mammalia, 430, 431. 



Metacarpals, of duck, 329. 



Metacarpus, 377. 



Metacrinus interruptus, 88. 



Metamere, definition of, 134. 



Metameres, of Polygordius, 142. 



Metapleure, 268. 



Metatheria, 364. 



Metathorax, 192. 



Metazoa, 51. 



Methona psidii, 466, 467. 



Mexican deer, 383. 



Mexican raccoon, 398. 



Mice, 389. 



Microgamete, 48. 



Micronucleus, of Ciliata, 45, 46. 



Microscope, invention of, 498; magnifying 



powers of, 509. 

 Microscopic anatomy, definition of, 513. 

 Microspores, 31, 32; of Flagellata, 41; of 



/ olvox, 39. 

 Microstomum, 109. 

 Micrura verrilli, 119. 

 Middle Ages, in science, 496. 

 Migration, of animals, 456; of birds, 336; 



of lemmings, 389; of Rodentia, 386. 

 Migration theory, 468. 

 Miliola, 25. 

 Military ants, 488. 

 Milk dentition, of Mammalia, 358. 

 Millers, 213. 

 Millipedes, 191. 

 Millipora alcicomis, 67. 

 Milne- Edwards, the elder, 507. 

 Milt, 287. 



Mimicry, protective, 465. 

 Minks, 399. 

 Miocene deer, 434. 

 Miocene period, 13, 443. 

 Mississippi catfish, 290. 

 Miles, 184. 

 Mitylus cdults, 246. 

 Moas, 337, 339, 437, 438. 

 Mocking birds, 355. 

 Mohl, von, 507. 

 Mole mouse, 389. 

 Moles, 392, 393. 



Mollusca, 228, 424, 447, 450, 451, 456. 

 Molluscoidea, 128, 447. 

 Molly cottontail, 392. 

 Moloch horridus, 314. 

 Monarch butterfly, 465. 



Mongoose, 403. 



Mongrel, 10. 



Monitor of the Nile, 315. 



Monkeys, 408, 455. 



Monocystis agilis, 33. 



Monodelphia, 367. 



Monogamous family, 491, 492. 



Monosiga, 42. 



Monotremata, 362, 438, 454. 



Monotus, 106. 



Moose, 383. 



Moral emotions, 492. 



Morphological evidence of evolution, 471. 



Morphology, 7, 514 ; definition of, 512 ; when 

 first used, 505. 



Mosquito, 215-217. 



Mosquito hawks, 198. 



Mother Carey's chickens, 349. 



Moths, 212-215, 22 7- 



Mountain goats, 452. 



Mouse, 457. 



Mucus, of Cyclostomata, 274. 



Mud eel, 303. 



Mudfish, 285. 



Mud puppy, 303. 



Mule, 378. 



Mule deer, 383. 



Murry, 289. 



Muscular system, of Mammalia, 353. 



decumanus, 389; At. musculus, 389. 



A/us decumanus, embryo of, 367. 



Museums, 511. 



Musk deer, 383. 



Musk lamprey, 271. 



Musk, of bats, 395. 



Musk ox, 383. 



Muskrat, 389. 



Mussels, 247. 



Mustela zibet Una, 400. 



Mustelus antarcticus, 275. 



Mutilations, 476. 



Mya arenaria, 248. 



Mycetozoa, 13. 



Mycteria senegalensis, 327, 330. 



Mygnimia avtculus, 465, 466. 



Mylodon robust us, 439. 



Myocommata, 275. 



Myomeres, of Amphioxus, 269 ; of Cyclo- 

 stomata, 272; of dogfish, 275. 



Myomorpha, 389. 



Myriapoda, 189, 420, 451. 



Myriotkela, 64. 



Myrmecophaga jubata, 369. 



Myrmeleon formicarius, 211. 



Mysis oculata, 166. 



Myxidium lieberkuhnii, 34. 



Myxine, 274. 



Myxomycetes, 13. 



Myxospongiae, 58. 



